Techniques for predicting network node transmission configuration indicator states

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects. a user equipment (UE) may receive a medium access control (MAC) control element (CE) indication that activates a network node-predicted transmission configuration indicator (TCI) state. The UE may transmit an acknowledgment (ACK) associated with the MAC CE indication. The UE may receive down-link control information (DCI) that indicates the network node-predicted TCI state for a subsequent communication, the DCI scheduling the subsequent communication at a scheduled time that is based at least in part on a threshold amount of time from the ACK or from the MAC CE indication. Numerous other aspects are described.

What is claimed is: 
     
         1 . A method of wireless communication performed by a user equipment (UE), comprising:
 receiving a medium access control (MAC) control element (CE) indication that activates a network node-predicted transmission configuration indicator (TCI) state;   transmitting an acknowledgment (ACK) associated with the MAC CE indication; and   receiving downlink control information (DCI) that indicates the network node-predicted TCI state for a subsequent communication, the DCI scheduling the subsequent communication at a scheduled time that is based at least in part on a threshold amount of time from the ACK or from the MAC CE indication.   
     
     
         2 . The method of  claim 1 , further comprising:
 transmitting, during a time period, the ACK associated with the MAC CE indication,
 wherein the DCI schedules the subsequent communication at a time that is based at least in part on a threshold amount of time from the time period, or 
 wherein the DCI schedules the subsequent communication at a time that is based at least in part on the threshold amount of time from the MAC CE indication. 
   
     
     
         3 . The method of  claim 2 , wherein the threshold amount of time is based at least in part on one or more of:
 an unknown TCI state switching latency,   a UE capability for reception beam prediction,   an indication, by the UE, of the threshold amount of time, or   an indication, within the MAC CE indication, of the threshold amount of time.   
     
     
         4 . The method of  claim 1 , wherein the DCI schedules the subsequent communication at the scheduled time that is further based at least in part on being within an additional threshold amount of time from the ACK or from the MAC CE indication. 
     
     
         5 . The method of  claim 4 , wherein one or more of the threshold amount of time or the additional threshold amount of time is based at least in part on one or more of:
 an unknown TCI state switching latency,   a UE capability for reception beam prediction,   an indication, by the UE, of one or more of the first threshold amount of time or the second threshold amount of time, or   an indication, within the MAC CE indication, of one or more of the threshold amount of time or the additional threshold amount of time.   
     
     
         6 . The method of  claim 1 , wherein, prior to reception of the MAC CE indication, the network node-predicted TCI state was not an active TCI state. 
     
     
         7 . The method of  claim 1 , further comprising:
 receiving the subsequent communication without receiving reference signals associated with the network node-predicted TCI state between a first time of receiving the MAC CE indication and a second time of receiving the subsequent communication.   
     
     
         8 . The method of  claim 7 , wherein reception of the subsequent communication without receiving reference signals associated with the network node-predicted TCI state between the first time of receiving the MAC CE indication and the second time of receiving the subsequent communication is based at least in part on one or more of:
 an indication, by the UE, of support for predicting reception beams without additional reference signal measurement,   downlink reference signals associated with the network node-predicted TCI state being associated with periodic or semi-persistent channel measurement resources, or   an indication, by the UE and within feedback associated with the MAC CE, that the reference signals are not requested.   
     
     
         9 . The method of  claim 8 , wherein the indication within the feedback associated with the MAC CE is associated with the network node-predicted TCI state based at least in part on:
 the network node-predicted TCI state being an only network node-predicted TCI state indicated in the MAC CE indication, or   the indication within the feedback associated with the MAC CE being associated with all network node-predicted TCI state indicated in the MAC CE indication.   
     
     
         10 . The method of  claim 1 , further comprising:
 receiving the subsequent communication after receiving reference signals associated with the network node-predicted TCI state between a first time of receiving the MAC CE indication and a second time of receiving the subsequent communication.   
     
     
         11 . The method of  claim 10 , wherein reception of the subsequent communication after receiving reference signals associated with the network node-predicted TCI state between the first time of receiving the MAC CE indication and the second time of receiving the subsequent communication is based at least in part on one or more of:
 an indication, by the UE, of a request for reference signal measurement,   a failure to indicate, by the UE, that the UE supports predicting reception beams without reference signal measurement, or   the network node-predicted TCI state being an unknown TCI state.   
     
     
         12 . The method of  claim 10 , wherein a number of the reference signals received between the first time of receiving the MAC CE indication and the second time of receiving the subsequent communication is based at least in part on one or more of:
 an indication, by the UE and after reception of the network node-predicted TCI state, of the number,   an indication of support for predicting reception beams with the number of reference signal measurements, or   a reference signal type of the reference signals.   
     
     
         13 . The method of  claim 10 , further comprising:
 receiving an indication of a resource for receiving the reference signals.   
     
     
         14 . A method of wireless communication performed by a network node, comprising:
 transmitting, to a user equipment (UE), a medium access control (MAC) control element (CE) indication that activates a network node-predicted transmission configuration indicator (TCI) state;   receiving an acknowledgment (ACK) associated with the MAC CE indication; and   transmitting downlink control information (DCI) that indicates the network node-predicted TCI state for a subsequent communication, the DCI scheduling the subsequent communication at a scheduled time that is based at least in part on a threshold amount of time from the ACK or from the MAC CE indication.   
     
     
         15 . The method of  claim 14 , further comprising:
 receiving, during a time period, the ACK associated with the MAC CE indication,
 wherein the DCI schedules the subsequent communication at a time that is based at least in part on a threshold amount of time from the time period, or 
 wherein the DCI schedules the subsequent communication at a time that is based at least in part on the threshold amount of time from the MAC CE indication. 
   
     
     
         16 . The method of  claim 15 , wherein the threshold amount of time is based at least in part on one or more of:
 an unknown TCI state switching latency,   a UE capability for reception beam prediction,   an indication, by the UE, of the threshold amount of time, or   an indication, within the MAC CE indication, of the threshold amount of time.   
     
     
         17 . The method of  claim 14 , wherein the DCI schedules the subsequent communication at the scheduled time that is further based at least in part on being within an additional threshold amount of time from the ACK or from the MAC CE indication. 
     
     
         18 . The method of  claim 17 , wherein one or more of the threshold amount of time or the additional threshold amount of time is based at least in part on one or more of:
 an unknown TCI state switching latency,   a UE capability for reception beam prediction,   an indication, by the UE, of one or more of the first threshold amount of time or the second threshold amount of time, or   an indication, within the MAC CE indication, of one or more of the first threshold amount of time or the additional threshold amount of time.   
     
     
         19 . The method of  claim 14 , wherein, prior to reception of the MAC CE indication, the network node-predicted TCI state was not an active TCI state. 
     
     
         20 . The method of  claim 14 , further comprising:
 transmitting the subsequent communication without transmitting reference signals associated with the network node-predicted TCI state between a first time of transmitting the MAC CE indication and a second time of transmitting the subsequent communication.   
     
     
         21 . The method of  claim 20 , wherein transmission of the subsequent communication without transmitting reference signals associated with the network node-predicted TCI state between the first time of transmitting the MAC CE indication and the second time of transmitting the subsequent communication is based at least in part on one or more of:
 an indication, by the UE, of support for predicting reception beams without additional reference signal measurement,   downlink reference signals associated with the network node-predicted TCI state being associated with periodic or semi-persistent channel measurement resources, or   an indication, by the UE and within feedback associated with the MAC CE, that the reference signals are not requested.   
     
     
         22 . The method of  claim 21 , wherein the indication within the feedback associated with the MAC CE is associated with the network node-predicted TCI state based at least in part on:
 the network node-predicted TCI state being an only network node-predicted TCI state indicated in the MAC CE indication, or   the indication within the feedback associated with the MAC CE being associated with all network node-predicted TCI state indicated in the MAC CE indication.   
     
     
         23 . The method of  claim 14 , further comprising:
 transmitting the subsequent communication after transmitting reference signals associated with the network node-predicted TCI state between a first time of transmitting the MAC CE indication and a second time of transmitting the subsequent communication.   
     
     
         24 . The method of  claim 23 , wherein transmission of the subsequent communication after transmitting reference signals associated with the network node-predicted TCI state between the first time of transmitting the MAC CE indication and the second time of transmitting the subsequent communication is based at least in part on one or more of:
 an indication, by the UE, of a request for reference signal measurement,   a failure to indicate, by the UE, that the UE supports predicting reception beams without reference signal measurement, or   the network node-predicted TCI state being an unknown TCI state.   
     
     
         25 . The method of  claim 23 , wherein a number of the reference signals transmitted between the first time of transmitting the MAC CE indication and the second time of transmitting the subsequent communication is based at least in part on one or more of:
 an indication, by the UE and after transmission of the network node-predicted TCI state, of the number,   an indication of support for predicting reception beams with the number of reference signal measurements, or   a reference signal type of the reference signals.   
     
     
         26 . The method of  claim 23 , further comprising:
 transmitting an indication of a resource for receiving the reference signals.   
     
     
         27 . A user equipment (UE) for wireless communication, comprising:
 a memory; and   one or more processors, coupled to the memory, configured to:
 receive a medium access control (MAC) control element (CE) indication that activates a network node-predicted transmission configuration indicator (TCI) state; 
 transmit an acknowledgment (ACK) associated with the MAC CE indication; and 
 receive downlink control information (DCI) that indicates the network node-predicted TCI state for a subsequent communication, the DCI scheduling the subsequent communication at a scheduled time that is based at least in part on a threshold amount of time from the ACK or from the MAC CE indication. 
   
     
     
         28 . The method of  claim 27 , wherein the one or more processors are further configured to:
 transmit, during a time period, the ACK associated with the MAC CE indication,
 wherein the DCI schedules the subsequent communication at a time that is based at least in part on a threshold amount of time from the time period, or 
 wherein the DCI schedules the subsequent communication at a time that is based at least in part on the threshold amount of time from the MAC CE indication. 
   
     
     
         29 . A network node for wireless communication, comprising:
 a memory; and   one or more processors, coupled to the memory, configured to:
 transmit, to a user equipment (UE), a medium access control (MAC) control element (CE) indication that activates a network node-predicted transmission configuration indicator (TCI) state; 
 receive an acknowledgment (ACK) associated with the MAC CE indication; and 
 transmit downlink control information (DCI) that indicates the network node-predicted TCI state for a subsequent communication, the DCI scheduling the subsequent communication at a scheduled time that is based at least in part on a threshold amount of time from the ACK or from the MAC CE indication. 
   
     
     
         30 . The method of  claim 29 , wherein the one or more processors are further configured to:
 transmit, during a time period, the ACK associated with the MAC CE indication,
 wherein the DCI schedules the subsequent communication at a time that is based at least in part on a threshold amount of time from the time period, or 
 wherein the DCI schedules the subsequent communication at a time that is based at least in part on the threshold amount of time from the MAC CE indication.